Answer:
It helped produce a standardized culture.
Step-by-step explanation:
Standardized culture refers to a culture refers to a culture that generally adaptable by different social groups in a society regardless of their background.
Radio popularized specific trends that listened by a lot of people in a wide area. Since a lot of people spend their time understanding /learning the trends promoted by the radio (such as ways of speaking, fashion, popular songs, etc) , these different group of people adopted one same standardized culture that untied them.